Elon Musk claims he tested negative and positive for the coronavirus on the same day.
In a tweet, the SpaceX and Tesla boss said he had taken four 'rapid antigen tests' and two gave a negative result and two came back positive.
He went on to say: "If it's happening to me, it's happening to others. I'm getting PCR tests from separate labs. Results will take about 24 hours."
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In his replies, Musk said he was experiencing 'symptoms of a typical cold'.
The billionaire has already ruled out he and his family getting a coronavirus vaccine, should one become available, telling the New York Times podcast Sway he didn't think the virus was a risk to them.
When asked if he or his family would be getting the jab, he said: "No, I'm not at risk for Covid. Nor are my kids."
Musk has previously been accused of spreading false information about the virus.
Back in July, he got involved in a Twitter spat with Columbia University virologist Angela Rasmussen, who accused Musk of spreading 'false and dangerous misinformation' after he claimed that the sharp rise in positive cases in the US was due to testing errors.
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He wrote: "There are a ridiculous number of false positive [Covid-19] tests.
"This is a big part of why C19 positive tests are going up while hospitalizations & mortality are declining."
But this was disputed by Rasmussen who said the tests don't give false positives enough for it account for the rise in cases and shared stats that showed hospitalisations were rising in states that were experiencing the outbreaks.
She added: "No one benefits if people with platforms allowing them to reach millions are spreading demonstrably false information and public health guidance."
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In March, Musk tweeted to say: "Based on current trends, probably close to zero new cases in US too by end of April."
The US has had more than 10 million positive cases of coronavirus and 243,000 deaths.
Musk also spoke out against the lockdown the US introduced in May.
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The 49-year-old chose to defy local lockdown rules and opened up his Tesla factory - posting on Twitter he said: "Tesla is restarting production today against Alameda County rules. I will be on the line with everyone else. If anyone is arrested, I ask that it only be me.
"California approved, but an unelected county official illegally overrode. Also, all other auto companies in US are approved to resume. Only Tesla has been singled out. This is super messed up!"
Featured Image Credit: PATopics: elon musk
